Lubrication



Jan. 25, 1944. E H KQCHER 2,339,784

LUBRICATION I Filed Aug. 5, 1940 2 Sheets-Sheet 1 I 4 I J2 46 u 38 as.

hi I" INV'ENTOR Edward H lfocfier wap/ 2mg TTORNEYS E. H. KOCHER LUBRICATION v Jan. 25; 1944.

' Filed Aug. 3, 1940 2 Sheets-Sheet 2 I INVENTORI I Edward 15 lfzwkex' V B 4 A I'TORNEY Patented Jan. 25, 1944 2,339,784 VIQUBRICATION Edward H. Kocher, Boonton, N. J., assignor to Auto Research Corporation, a corporation of Delaware Application August 3, 1940, Serial No. 350,651

- 7 Claims.

The present invention relates to lubricated machine tools, and particularly relates to-lubricated machine tools of the type classified as turret lathes and milling machines.

In connection with these machine tools, it is desirable to provide an automatic substantially continuously operating lubricating system which will function as part of the machine to supply lubricant to the various sliding bearings on the mechanism throughout operation thereof, and it is among the objects of the present invention to provide a simple,.ine ;pensive, readily assembled, automatic continuous lubricating system for such 'machine tools, and particularly for milling machines which will supply relatively small yet accurately proportioned quantities of lubricant to the bearings to be lubricated throughout operation-of the machine tool. I

Stillfurther objects and advantages will appear in the more detailed description set forth below, it being understood, however, that this more detailed description is given by way of illustration and explanation only and not byway of limitation, since various changes therein may be made by those skilled in the art without departing from the scope and spirit of the present invention.

In accomplishing the above objects, it has been found most desirable to utilize a recess in and about the mechanism, either upon the bed of the mechanism or in the rotating or sliding part of the mechanism, to carry, a pump unit preferably consisting of an unpacked elongated plunger piston pump which is inserted in a recess in the mechanism.

The pump actuator mechanism preferablyextends outsideof the reservoir, and is operated incidentally to the turning or reciprocation of some manually. actuated lever which is operated incidental to initiation of operation of the machine or during the course of operation of the machine.

The pump is provided with an inlet cap having an enclosed strainer and a conduit to feed lubricant to the pump.

In the drawings which show one of the various possible embodiments which may be con structed according to the present invention, but to which the invention should not be restricted, since this embodiment is merely illustrative,

Figs. 1 to 3 illustrate one installation according to the present invention, as applied to a universalmilling machine; Fig. 1 being a plan view in partial section of the pump and actuator construction upon the line l--I' of Fig. 2; and.Fig. 2 being a side elevation in partial section upon the line 22 of Fig.1; Fig. 2 is a detailed fragmental sectionalview showing the pump plunger in operative position and Fig. 3 being an end view .takenfrom theline 3-3 of Fig. ,1;

end of the charge stroke.

25 serving as an inlet.

to 3, there is-shown a milling machine having a saddle l0 which moves horizontallyand which is provided with atable 9 having a traverse motion. The saddle I0 is provided with the base 8 which rides upon the bed of the machine.

This table is actuated through a' rotatinglever ll controlling the traverse motion 'of the table. The table rests between the oblique faces l2 of the saddle l0 and upon the lower face [3 of. the recess of such saddle.

One side M of the saddle I0 is recessed, as indicated at I5, to receive the press fitted body I6 of the pump which is provided with a bore or cylinder l'l. 1

The body I6 is held in position by the pin IS. The bore 11 receives the plunger l9 having a reduced end portion 20, which plunger has a connection at 2| to the connecting rod-22. The rod 22 extends to a chamber or bore 23 of one side of the saddle or knee and has a bearing The connecting rod 22 is biased in the direction 25 by the coil spring 26 which reacts against the face 21 of the body l6. j

The end of the, connecting rod '22 is provided with a mount 28 which is received in the recess 29 of the table traversing control lever ll at'the This lever. rotates within the bearing or recess3il in, which it'is received;

The end of the bore I1 is enlarged and re- 'ceives inlet ball unit 3|.

The end of the pump body is enlarged as in"- dicated at 32 and threaded as indicated .at 33 to receive the cap 34 which has a central opening The inlet- "is connected through the nut 36 and .the coupling 31 to the 'inlet tube or pipe 38, connected by the coupling connection 39 to a lubricant reservoir at 40.

In the base of the cap 34 is pressed the felt strainer 4| and the screen backing discs 42', which are pressed against the face 44 of the enlarged portion of the body I6.

As the lever H is rotated, the lubricant wil be fed out through the outlet ball check connection 45 to the tubing 46 leading to the bearings of the mechanism to be lubricated. 1

The lubricating metering. fitting shown, in Fig. 4' may be fed "from the outletconnection 46 of Fig. 3. The body 50 of the fitting is provided with a small bore I, substantially com pletely filled by a pin 52 which forms a narrow annularlcrevice of theorder of one to several thousandths of=an inch, which has a substantially greater restricting efiect than the tubing of a bearing of the lubricant distributing system.

The inlet socket 53 is provided with the strainer 54, while the outlet socket 55 is provided with" i the check valve 56. I

These fittings 50 will ssq'r pr per.;p op r;

I0, permit reciprocation as indicatedby the ar- H rows I02. The hand wheels I03 and I04 permit ready controlof the mechanism while the handle I05 controls the shaft I I which is connected with the reversing mechanism. a

: The-upper ends of plungers I 06' are in the pathof the lugs I06 for actuation thereby through atransmission (not shown) to turn shaft II between thepositions shown in Figs. 2 and 2a andcause reciprocation of the connecting rod 22 and the piston I9.

As-shown in Fig. 6, the reservoir 40 is provided with the sight glasses I01, held in position in the threaded insert I08 by the threaded ring I09. The reservoir may be filled through the filling opening H0. The outlet connection 46 leads to the junction II2 having the bolt holes ll3 which enable the junction H2 to be connected to the saddle I0. The tube 46 is connected to the junction II2 by the coupling connection II4 feeding the axial bore H5. The axial bore I-I5 discharges to the flow metering units H6, H1, H8, H9, I20, I2I, I22, I23, I24, which are of the construction shown in Fig. 4.

Theflow metering fitting II6 supplies lubricant tothe bearing I 25 by the tube I26. The flow metering fitting II'I supplies lubricant to the bearing I21 through the tube I28. The fiow metering fitting II 8 supplies lubricant to the bore I29, which bore I29 feeds one side of the ways of the table '9 upon the saddle ID.

The flow :metering fitting II9 feeds the bearing I3I by the tube I32.

The flow metering fitting I20 feeds the bearing I33 by the tube I34.

The flow metering fitting I2I feeds lubricant to the drip I35 at the end of the tube I36.

reversing lever, lubricant will be therefore supplied from the reservoir 40 in the saddle tothe table driving mechanism, the table ways and the bearing surfaces at the top of the saddle, all as appears in Fig. 6.

It will be understood that many changes could i be made in the particular features of milling machine as shown; and many apparently widely different embodiments ofthis invention. could be and it is intended that all matter contained in the above description shall be interpreted as illustrative and not in a limiting sense.

What is claimed is:

1. In a centralized matted machine tool construction, a base having an elongated recess therein, a, cylindrical pump body received in said -reeess, an elongated plunger fitted in an axial made without .1 departing. from the scope. thereof offsaidbody' andiat the side of said body communicatingQ-withesaid bore, the first tapped socket being plugged with a threaded inlet check valve unit and the latter tapped socket being plugged by an outlet valve check unit, the inlet end of said pump body being enlarged and threaded; a threaded cap fitted over said body carrying a-strainer member and an' inlet connection to said Gap.

2. A centrall -lubricating pump'ior a machine tool, comprising abody to -be fittedinto arecess in the machine tool'the-end ofwh iclr body is 'to project beyond the recess'in the machine --tool,

said body having a; central-axial bore receiving an elongated unpacked piston plunger, an inlet check valve plugging the end of said bore, a cap carrying aninlet filter covering the end of said body, said plungerextendingbeyond said body and a connecting rod engaging the-projecting end of said plunger and carrying a coil spring reacting at one end against said body and at the other end against said connecting rod.- i

3. A central lubricant pump'for insertion in an "elongated socket in a mechanism to be lubricated, said socket having an actuatingme'mber extending across the inner end thereoffsaid pump comprising an elongated cylindrical pump body to be closely fitted into said'so'cket, said "body having a central axial bore and an enlarged threaded end portion to project beyond said socket, said borereceiving an'elongated unpacked piston plunger projecting beyond said bodyy'an axially aligned connecting rod engaging the end of'said plunger and projecting to said actuating member, a coil spring encircling connectingirod and reacting-against said body at one end and connected to said connectingrod at its other end and an inlet'cap screwed onto said enlarged threaded end portion carryingIan-inlet tubing connection.- 3;: 1-. r 4. For use in a machine tool having a cylindrical socket opening onto a 'movabl'e partbf said tool and a, lubricant reservoirseparated therefrom, an elongated cylindrical pump body to be closely fitted'into said socket, said pump body .having a central axial bore. 'containingian elongated unpacked piston plunger, thefinside end of said body having an actuating "connection tosaid part and the outside end of said body receiving an inlet.cap and a connection from said reservoir to said cap- 5. The pump of claim 4, said cap including a filter and enclosing an inlet check valve positionedi at the end of said bore.

6. The pump of claim 4, said actuating connection consisting of an elongated rod having a position in said.cy1indrical socket,

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WARD. H. mean.-. 

